Stereoselective 1,3-dipolar cycloadditions of nitrones derived from amino acids. Asymmetric synthesis of N-(alkoxycarbonylmethyl)-3-hydroxypyrrolidin-2-ones
Diastereoselective asymmetric 1,3-dipolar cycloadditions of N-(alkoxycarbonylmethyl) nitrones derivedfrom glycine, alanine and phenylalanine have been studied both experimentally and theoretically. Asymmetric induction is evaluated by either introducing a chiral group at the nitrone nitrogen atom or by using Oppolzer's sultam acrylamide. In both cases the sense of the asymmetric induction is the same
Asymmetric synthesis of diversely substituted N-hydroxypyrrolidines using cycloadditions with chiral nitrone enolate/ylids
作者:Stephen Hanessian、Malken Bayrakdarian
DOI:10.1016/s0040-4039(01)02305-x
日期:2002.2
A stereoselective synthesis of diversely substituted N-hydroxypyrrolidines is reported, based on the cycloaddition reaction of chiral non-racemic nitrone ylids with a variety of α,β-unsaturated esters.
WALSER A.; LAUER R. F.; TRYER R. I., J. HETEROCYCL. CHEM., 1978, 15, NO 5, 855-858,
作者:WALSER A.、 LAUER R. F.、 TRYER R. I.
DOI:——
日期:——
5-Hydroxy[1,2]oxazinan-3-ones as potential carbapenem and D-ala-D-ala surrogates
作者:Saul Wolfe、Christiana Akuche、Stephen Ro、Marie-Claire Wilson、Chan-Kyung Kim、Zheng Shi
DOI:10.1139/v03-123
日期:2003.8.1
proposed new family of antibacterial agents targeted to the penicillin receptor. The glycine and alanine members of the family have been synthesized, as racemates, in seven steps from the four-carbon synthon diketene and the tert-butyl esters of N-hydroxyglycine and N-hydroxyalanine. Numerous alternatives to diketene have also been examined, but these lead mainly to five-membered cyclic hydroxamates